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Why is frost considered hazardous to flight?

 



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2 Answers

The rough surface of the frost spoils the smooth flow of air over the wings causing early airflow separation along the wing resulting in decreased lifting capability.Frost is such a thin layer, it would not significantly change the basic shape of the airfoil.
I wonder if any of you have a great stories of frost to share…

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Flight_Instructa have a great explanation. It doesn’t necessarily change the shape of the airfoil, but it spoils the airflow over the top of the wing, causing it to separate from the surface; destroying lift and negative air pressure.

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